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He paid £399 for the home and opted to pay £200 extra, so he only had to leave a deposit of £250. Some customers can opt to leave a deposit of £1,250.

Customers are told that it takes 28 days until a deposit can be reclaimed by the customers themselves.

"You don't automatically get your deposit," said Andrew, "You have to ask for it, which I find a bit odd."

Andrew Buxton was left "frustrated" by his pursuit of his deposit (Image: Andrew Buxton)

After returning his vehicle on March 17, Andrew was still waiting for his deposit to be returned 53 days later, despite contacting the company three times.

"It's frustrating having to take time out phoning them and emailing them," he said.

"It's the principle, I won't use the company again now. I don't think you should have to chase your own money.

"I was going to pay the extra £1,000 but I'm pretty glad I didn't now."

One of the negative reviews of the company on Google (Image: Google)

On Google a litany of one-star reviews slate the company for its deposit repayment delays.

Reviewers warn people not to use the company and complain of being "fobbed off" by customer services.

"They seem to be doing it to a lot of people," said Andrew. "People said you get it back but you have to be persistent. You shouldn't have to do that really should you?"

Another one star review online (Image: Google)

A spokesman for National Motorhomes said the deposit repayment problem stemmed back to a change in its merchant services provider in October.

He explained that customers are required to perform a self-service refund online and a software problem is not processing the payments, meaning the company has to request manual repayments from the merchant services provider.

The spokesman said Andrew would get a manually authorised refund.

Another frustrated reviewer (Image: Google)

"We are still working with the software provider," the spokesman said. "We're not sure if it's a browser problem.

"We are dealing with a back log. We do have to work through them in the order they come in."

He added that the company refunded £35,000 in the last fortnight and £3.9 million in the last year and only a "small percentage" of customers were experiencing problems.